While discussing a mod with custom music, I've had an idea about making a sort of Music Player mod, to allow the player some control over the background music (like seeing the track list, current played track, skipping tracks and selecting different track to be played). I've looked around the API an...

You could check how raiguard did something similar in his Mouse-over Construction mod (https://mods.factorio.com/mod/MouseOverConstruction) and start from there. As for the drawable rectangle tool, check out the SelectionToolPrototype (https://lua-api.factorio.com/latest/prototypes/SelectionToolProt...

When you right-click on a stack of items, half of that stack (rounded up) will be put into the cursor. Here you can see I had a stack of 3 wood in my inventory, and after right-clicking 2 pieces of wood are placed into the cursor: splitstack1.png However, if I place wood on the quick bar and right-c...